import turtle
n = eval(input("请输入一个大于等于三且小于十的整数："))
turtle.penup()
turtle.fd(-500)
turtle.fillcolor("yellow")
turtle.pencolor("blue")
turtle.pendown()
turtle.pensize(3)
turtle.begin_fill()
for i in range(n):
    turtle.circle(50,steps = i+3)
    turtle.fd(100)
turtle.circle(50,360)
turtle.end_fill()
turtle.hideturtle()